usr.bin/mail/getname.c

   1 /*      $NetBSD: getname.c,v 1.10 2005/07/19 23:07:10 christos Exp $    */
   2
   3 /*
   4  * Copyright (c) 1980, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)getname.c   8.1 (Berkeley) 6/6/93";
  36 #else
  37 __RCSID("$NetBSD: getname.c,v 1.10 2005/07/19 23:07:10 christos Exp $");
  38 #endif
  39 #endif /* not lint */
  40
  41 #include "rcv.h"
  42 #include "extern.h"
  43
  44 /* Getname / getuserid for those with hashed passwd data base). */
  45
  46 /*
  47  * Search the passwd file for a uid.  Return name on success, NULL on failure
  48  */
  49 PUBLIC const char *
  50 getname(uid_t uid)
  51 {
  52         struct passwd *pw;
  53
  54         if ((pw = getpwuid(uid)) == NULL)
  55                 return NULL;
  56         return pw->pw_name;
  57 }
  58
  59 /*
  60  * Convert the passed name to a user id and return it.  Return -1
  61  * on error.
  62  */
  63 PUBLIC int
  64 getuserid(char name[])
  65 {
  66         struct passwd *pw;
  67
  68         if ((pw = getpwnam(name)) == NULL)
  69                 return -1;
  70         return pw->pw_uid;
  71 }